问题补充:
They when the teacher came in.
A. talk
B. are talking
C. to talk
D. were talking
答案:
A. talk
B. are talking
C. to talk
(答案→)D. were talking
解析:句意:当老师进来时,他们正在说话。结合语境可知主句描述的是过去某时正在进行的动作,故用过去进行时态。选D。
时间:2021-11-11 12:18:34
They when the teacher came in.
A. talk
B. are talking
C. to talk
D. were talking
A. talk
B. are talking
C. to talk
(答案→)D. were talking
解析:句意:当老师进来时,他们正在说话。结合语境可知主句描述的是过去某时正在进行的动作,故用过去进行时态。选D。